Citations
Joseph Needham's sketch of a well drilling rig seen in China, 1958, GBR/1928/NRI/SCC2/241/2/7. Needham Research Institute. |
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Joseph Needham's sketch of a well drilling rig seen in China, 1958, GBR/1928/NRI/SCC2/241/2/7. Needham Research Institute. https://archivesearch.lib.cam.ac.uk/repositories/21/archival_objects/349407 Accessed April 28, 2025. |